Boiler-feed-water heater.



L A. PERSICHETTI.

BOILER FEED WATER HEATER. APPLICATION FILED JAN.2l.v19l8.

Patented Dec. 17,1918.

JOSEPH A. EEBSICHETTI, 0F PHILADELPHIA, PENNSYLVANIA.

BOILER-FEED-WATER HEATER.

Specification of Letters Patent.

Patented nee; 17, 1918.

Application filed January 21, 1918. Serial No. 212,879.

To all whom it may concern:

Be it known that I, Josnrrr ANTHONY Pnnsrormrrr, a citizen of the United States, and a resident of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Boiler'Feed-VVater Heaters, of which the following is a specification.

The principal object of the present invention is to preheat the feed water to a comparatively high temperature, such for example at, 300 F, prior to its introduction into the boiler, and to do this by means of heat which is usually wasted and not ap plied to steaming the boiler.

The invention will be claimed at the end hereof, but will be first described in connection with the embodiment of it, chosen from other embodiments, for illustration in the accompanying drawings, in which- Figure l, is a view, largely diagrammatic, and partly in section of apparatus embodying features of the invention, and

Fig. 2, is an end view of a portion of the apparatus shown in Fig. 1.

In the drawings 1, is a heat exchanger having live steam connections 2 for attachment from the boiler steam space and having feed connections 3 for the water space of the boiler. As shown the heat exchanger comprises water coils through which the feed water is fed as by the pump a, surrounded by outer coils 5, through which the live steam passes. The live steam connection 2 is shown as connected to a header 6, to which steam is fed from the boiler 7 by a pipe 8. 9, is a steam generator adapted for exposure to the hot flue space 10 of the boiler and having what may be called trap connections 11 for water of condensation from the exchanger and steaming, as by way of the connection 12 in common with the boiler 7. In the present instance the connection 12 is shown as entering the pipe 8. In general, however, the piping shown is illustrative since the drawings, as awhole, are diagrammatic.

In use, live steam is introduced into the copies of this patent may be obtained for five cents each, by addressing the exchanger 1 and so heats the water leaving at 3 to a very high temperature, approximate 300 F. ater of condensation from the heat exchanger reaches the steam generator 9. The steam generator 5) is exposed to the heat of combustion in such a way that steam is generated in it and this steam is utilized along with the steam generated by the boiler 7, and in a sense may be said to supply live steam used for heating the feed water. The pressure in the steam generator 9 and in the boiler is substantially the same so that they can steam in common, and water of condensation in the connection 11 facilitates and makes certain the described mode of operation. Of course it must be remembered that the heat energy required for steaming in the generator 9 is supplied from the fire under the main boiler 7 and by reason of the construction of the latter would be lost or wasted unless applied in the manner described for replacing the live steam introduced into the heat exchanger.

What I claim is:

1. A boiler feed water heater comprising the combination of a boiler, a double-pipe heat exchanger for heating feed water, a steam generator exposed in the flue passage of the boiler, and a closed pipe system for passing live steam from the boiler to the steam pipe of the exchanger and for returning the water of condensation of that steam from the exchanger through the steam generator an thence, as steam, back to the boiler, substantially as described.

2. A boiler feed water heater comprising the combination of a boiler, a heat exchanger for heating feed water, a steam generator exposed in the flue passage of the boiler, and a closed pipe system for passinglive steam from the boiler to the steam space of the exchanger and for returning the water of condensation of that steam from the exchanger through the steam generator and thence, as steam, back to the boiler, substantially as described.

JOSEPH A. PERSICHETTI.

Commissioner of Patents,

Washington, D. O.

which may 

